| Summary: | 碩士 === 國立高雄應用科技大學 === 化學工程與材料工程系博碩士班 === 105 === In this study, transparent conductive hybrid films (TCFs) based on reduced graphene oxide (rGO) conjugated with silver nanowires (Ag NWs) were fabricated by spin coating method and thermal treatment. Various feature parameters (i.e., line length (L), line diameter (D) and the aspect ratio (L/D)) of Ag NWs were synthesized by polyol process. Ag NW-rGO composites were further prepared by combined Ag NWs with rGO in one-step process, where rGO was prepared by modified Hummers method. Effects of reaction conditions of polyol process (i.e., stirring speed, feed rate and PVP concentration), purification methods (i.e., traditional centrifugal and selective precipitation method) and rGO layer on the feature parameters, conducting networks, sheet resistance and transmittance of Ag NW-rGO TCFs are characterized. Results showed that, at appropriate reaction conditions of polyol process, the synthesized Ag NWs exhibits the average line length (Lavg.) is 5.8 μm, the line diameter (Davg.) is 112 nm and the aspect ratio ((L/D)avg.) is 51.8. As compared with the traditional centrifugal method, the selective precipitation method provides the most of non-conductive PVP layer, which on the surface of Ag NWs, and the growing incomplete Ag NPs can be effectively removed. The reduction of the electron transfer resistance and light scattering phenomenon can be achieved by the removal of Ag NPs. The structural defects of Ag NWs networks which caused by uneven dispersion can be improved by the Ag NW-rGO conductive composites. At coating quantities 150 μL, Ag NW-rGO TCF exhibits the best optoelectronic properties, the sheet resistance is 167 Ω/sq and transmittance is 50% (at 550 nm). The optoelectronic properties of Ag NW-rGO TCF are markedly affected by their morphology and structure of Ag NW-rGO conductive networks.
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